The Indus and Ganges Rivers form a fertile plain. This fertile plain gave rise to the important civilization known as the Indus Valley civilization and cities, such as Harappo and Mohenjo Daro. The arrival of the nomadic Aryan tribes to the Valley of the Indus River is related, according to some historians, for the decline of the Indus River civilization.
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D) Han control of Silk Road trade.
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Paying workers higher wages would cause them to spend more money, because they will most likely feel more obligated to buy more things because they have the money to do so. So it would profit society as a whole, because that would mean, people are buying more, because of being payed more, and then people work more, and what is being bought will be made more of which is the product of working more to get paid more so that would restart the whole cycle.
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